Wheeled gang-plow.



Patented Aug. 6, 1912 :QQ @n mm. m ma.

,0. Q i w n .um m., I s s mm h www o ad. 0 nu .WI ESSES N. WEILBR. l WHEELED GANG PLOW.

APPLICATION FILED PBB.B

Patented Aug. v6, 1912.

5 SHEETS-SHEET 2.

f2/7 WMM/WU N. WEILER.

WHBBLBD GANG PLOW.

APPLIOATION FILED Hum, 1911.

1,085,126, f PatentedAug. 6,1912.

5 BHEETS-SHEET 3.

N. WEILBR.

WHEEIED GANG PLOW.

APPLmATIoN 'FILED rma, 1911.

` 1,035,126.- Patented Aug. 6,1913.

and State of Colorado, have invented cer- AUNITED STATES, FATEN T OFFICE.

NICHOLAS WEILER, 0F FORT COLLINS, COLORADO, ASSIGNOR OF ONE-HALF TO B. L.

Y SHRADER, 0F PLAINVIEW, TEXAS.

WHEELEI) GANG-PLOW.

Specicaticn of Letters Patent.

Patented Aug. 6,1912.

Application tiled February 8, 1911. Serial No. 607,312.

To all whom it may concern:

Be it. known that I, NICHOLAS VVEiiinn, a citizen of the United States, and a resident of Fort Collins, in the county of Larimer tain new and useful Improvements in Wheeled Gang-Flows; and l do hereby declare that the following is a full. clear, and exact description thereof, reference being ,10 had to the accompanying drawings, and to the characters of reference marked thereon, `which form a part of this specification.

This invention relates to improvements in motor drawn wheeled gang plows-of the vide an improved disk type and the invention consists in the matters hereinafter set forth and more particularly pointed out in the appended claims. l

Among the objects of the invention is to provide an improved single or continuous frame for such plows, the members of which are jointed or hinged together to permit the frame to flex vertically so as to adapt the plow to uneven ground, the plow having a continuous row or series of plow disks mountedl thereon and extending from end to end of the frame.v

A further object of the invention is to provide a mechanism for raising and lowering all of the plow disks from and to the ground, so arranged that the actuating member of such mechanism carried by the frame may flex to adapt it to the frame.

A further' object of the invention is -to provide an improved means for connecting the tplow disks with the frame, arranged to permit the disks to yield away from the ground when an obstruction, such as a stone, is struck thereby, and thus avoid. undue stress being brought upon the disks and their mountings.

A further object of the invention is to provide a novel manual .operable means for operating the plow raising and lowering de- `vieeszfroin the platform of the engine.

`Another object of theinvention is to proguiding means for hold- .ing the plow latera ly in place and for pres venting its shifting out of the line of draft, 'due to the .tendency of the disks, when in action in the ground, to thrust the plow latvide a connection between ithe rolling supporting -elements of the Iplow frame together with means` for mounting the supporting elements in such a way that when the usual drift connections, by which the plow when in action in the field is drawn forwardly, are released yand the plows are elevated from the ground to travel on the road, and the engine attached to one end ofv the plow fra'fne, the several supporting wheelsI or elements will track in lilies parallel with the longitudinal axis of the plow frame so that the plow frame may be drawn forwardly when moved from place to place in a path parallel to such longitudinal axis.

Other objects of the invention-will appear from the foregoing description.

ln the drawings-Figure 1= is a plan view of a plow embodying my invention. Fig. 2 is a side elevation thereof.' Fig. 3 is a side elevation of the plow frame and the stipporting elements.i showing the manner in which the tiexible frame adapts itself to uneven ground. Fig. t is a detail cross sccton of the frame` showing a rolling supporting device which is constructed to prevent lateral shifting of the plow when the plow disks are in action. Fig. 5 is a. similar view taken in the axial plane of said rollingy supporting device. Fin'. G is a det-ail illustrating 'the manner oft` mounting theplow disks on the frame, showing a spring connection between the disk mounting and its actuating bar to permit the disk to yield out of the ground when it encounters a stone or like obstruction. Fig. 7 is a similar view showing the manner in which the plow disks vield on stril'cii-ig un obstruction. Fig. 8 is a detail section on the line 8-8 of Fig. G. Fig. 9 is a plan view illustrating the draft connections between the low and en' gine and also the mechanism or operating the plow raising and lowering devices. Fig. l 10 is a detail illustrating in side elevation the part of the plow raising and lowering mechanism'which extends to the engine. Figs. 11 and 12 are details ofthe hinge connections between the plowl frame members. The frame of the plow comprises two side 18` arranged in the form of a parallelogram.

The side member 15 may consist of a bar i' members 15 and 1G and end members 17 and of plow disks which are mounted on the the internal braces 2O and 21.y The frame members are hingedor jointed in the manner hereinafterY described to permit the con*- tinuous frame to fiex vertically', the frame being'shown as thus divided into three'seej and rear furrow wheels 24, 25, respectively.

Extending from the land side ,of the frame are other rigid and braced arms 26, 27 and 28, to the outer endsof which are pivot-ally mounted the shafts for thev land wheels 29, 30 and 31.'

'In addition to the supporting wheels dcscribed I have provided other rolling supporting elements 33, 34and 35, one for each section, which arefarranged to travel on lthe unplowed ground and to dig into the ground insu'ch way ais'to afforda hold of the plow in the ground tov prevent it shifting laterally.. These' rollers may be termed draft regulating and support-ing rollers. The detail'of the rollers 33 and 34 is alike and ,is shown in Figs. 4 and 5.

Eachroller is formed with a plurality of annular spaced flanges forming relatively sharp disks 3G, 36.- which penetrate the ground and said flanges or disks may be formed on two or more cast sections 37 as found convenient or de sirable. As herein shown there are two of such sections in each roller which are keyed to a shaft 38 that is rotatively mounted in bearings in the lower ends of the arms of yokes 39. Said` yokes are provided with upright fixedI stems 40 which extend upwardly through bearings 41 in arch members 42 which span the 4frame from side to side and are iixedly attached at their ends to the side members of the frame. Said arch members extend obliquely across the frame or at right angles to the line of draft ofthe plow. The construction described permits the rollers to rotate or swivel freely relatively to the frame about the axes of .their stems 40. The frame is adapted to be raised and lowered relatively to said 'draft regulating and supporting rollers by means of exteriorly screw'- threaded sleeves 43 which are rotatively mounted on the upper ends of said stems 40 and which have screw-threaded engage.- ment with the rings 44 that are connected by the links 45, 45 to bearings 41 of said archmembers 42. The said adjusting sleeves 43 are provided with -hand wheels 46 by which to rotate them and screw bolts 47 extend downwardly through the hand wheels into theupper ends of the sleeves to the sleeves. By turning said adjustin screws in one direction the frame is raised relatively to the supporting and draft regulatingrollers, and the extent of movement of the adjusting sleeves is such as to raise the frames sufficiently to raise the' disks carried thereby away from the ground when the plow is being moved from place to place. The rear supporting and draftregula'ting roller 35 is mounted in a bracket 50 which extends rearwardly from the rear member 18 of the frame. Said roller hasa swivel conneeti on with the bracket and is provided with a raising and lowering device embrac- `ing a hand -wheel 51 which is generally similar to the frame raising and lowering devices before 'described for the rollers 33 and 34.

' Each of the sections of the frame is provided with one or more of said draft regulating and supporting rollers and said rollers are made of considerable weight so as to insure them cutting into the ground to afford .the proper hold to prevent lateral shifting of the plow. The rollers of the frame. sections, with the exception of the last section, may be provided, in addition to the edged disks or flanges, with relatively wide tread supporting .wheels 53, 53 which are located on the side of the frame adjacent to the disks to thereby better support thedisks. If the weight of the row of disks be such as to tend to tip the plow toward the disk side of the plow, I may provide more than one supporting and draft adjusting roller for each section of the frame, or

may extend the said rollers somewhat be-l yond the land side of the frame.

The land side support-ing wheels, as well j as the furrow wheels, are also provided with nected to the swinging stub axles for said wheels and are adapted for screw-threaded engagement with the rings 56 supported from the frame in the same general manner as the rings 44 shown in connection with the supporting and draft regulating' rollers. The said screws 5,5 are provided with pivotedcranks 57 ,which normally hang in the position shown in Fig. 3, by which the screws are turned to raise and lower the frame relatively to said supporting wheel. It will be understood that all the raising and lowering screws are operated to raise the frame and therewith the disks when the plow'is to be moved from place to place, or when at other vtimes a relative adjustment between the supporting elements and disks 'is desired.`

The gang frame, instead of being made `rigid from end to end, as has heretofore been the common practice, 'is made vertically flexible so astto permit the plow to adjust itself to uneven@ ground. For this purpose the frame vmembers 15 and' 16 are is@k provided in their length with a series o joints or, hinges, thus dividing the frame into a plurality of sections,-all constituting however continuous parts of a lunitary frame.

The detail of the hinge or joint 60 of the landside frame member 15 is shown in Fig. 11 wherein it is seen that one end of one member is turned outwardly at 61 to overlap the adjoining end of the adjacent member, and a bar 62 is riveted vto the inner side of the out-turned member to provide between the same and ont-turned end 61vv a space to receive the end of the adjacent member, and said parts are pivotally con` nected by the horizontal pivot pin 63.

The detail of' the joint 65 of the plow side frame member which carries the disks is shown in Fig. 12. As herein shown the sections of the rear frame member 16 are reinforced by heavy bars of iron 66 attached to the inner faces thereof. At the joints or hinges 65 the sections of the frame member 16 are slightlyseparated, and the bars 66 are lapped one over the other with a hingepin 68 extending through thel overlapping ends of the reinforcing bars and through the vertical web of one of the adjacentangle bar frame members 16.

The manner of attaching the plow disks to the frame member 16 is best shown in Fi s.

'6, 7 and 8. The mounting for each .disk

consists of an L-shaped bracket 70 that is pivoted near the end of its shorter arm by the pin 7l to the frame member 16, said pivot pin passing through the vertical web of the frame member and through the reinforcing bar 66. The longer arm of said vbracket extends laterally from the frame member and the disk is rotatively mounted thereon in the manner illustrated in my priorapplication for United States Letters Patent, Serial Number 596,966 filed on the,` 12th day of December, 1910. This feature of the pivotal mounting of the disk consti-v tutes no part of the present invention and need not be further described. Said disks are adapted to be simultaneously swung into and out of the ground by means which act on the brackets 70 to'swing them vertically on their pivots. The actuating means consists, as in the construction shown in my, aforesaid prior application, of a reciprocating bar 72, shown as having the form of angle bars, that is slidingly mounted in the frame above the .frame member I6 and is connected to the L-shaped bracket 70" by link connections made as follows :--Extending laterally fromeach of said brackets 70 is a bifurcated lug `to which is hinged, as by the bolt76, the lower end of a slotted bar 77 whichis pivotally and slidably connected at its upper end to the reciprocating bar 72. The connection between the upper end of said link'77 and the reciprocating bar consists, in the present instance, of a bracket 79 that is pivotally mounted, as by the bolt 80, on the reciprocating bar and extends laterally therefrom through the slot 81 of said link. Said bracket fits closely in said slot..

and slides therein endwise of the link. The bracket is apertured to receive a screwthreaded sleeve 82 through which slides the upper end of a rod 83 that is hinged at its lower end to the hinge bolt 76, said rod being separated from the link 77 at the hinge bolt by the s acing block 85. Interposcdv between the anged end of the sleeve 82 and a shoulder 86 on said rod is a spiral ex- -pansion spring 87 which acts, through the.,

rod and the lug 75, to normally hold the disk and its supporting bracket in its operating position vfor plowing, as shown in Fig. 6, the spring heilig made of considerable strength for this purpose.

When the reciprocating oar 72 is moved eudwise it acts, through the links 77 and brackets 70, to swing the outer ends of thev brackets upwardly and thereby swing the lower sides of the disks away from the ground; and movement of the reciprocating bar in the other direction serves to swing the disks toward the ground. In this movementI or operation of the disk the springs 87 perform no function and the upper ends of the links swing about the pivot bolts or pins 80.

The purpose of the springs 87 is to permit the disks to yield out of the ground, relatively to the reciprocating bar 72, when they strike an obstruction, as will be clear from an examination of Fig. 7. The spring 87 is at such time placed under compression and the slotted link is shifted upwardly, relatively to its upper pivot. When the obstruction has been passed the spring will return the disks back to their operating position in the ground.

The reciprocating bar 72 is guided between upper and lower rollers 90, 91 carried by standards 92 which rise from and are rlgidly attached to the frame member 16. Said bars are confined in their straight path of movement by means of guide screws 93 -(Fig. 1) which extend through guide slots 94 in the reciprocating bar and engage extensions of the standards 92, as best shown in Fig. 1. The said reciprocating bar is made of a number of sections equal to the` sections which compose the frame and of the same length as the frame sect-ions, and are jointed at 96 opposite to the joints or hinges of the adjacent plow side frame member 16 so as toV flex with'said frame' members. The said reciprocating bar is reciprocated on the frame by means of a. rack and pinion mechanism made as follows :.-The bar is provided near its center witha toothed rack 98 which is engaged by 1a pinion 99 fixed to a verticalshaft on the' aid.

lower end of .which is mounted alworm wheel 100. Said worm wheel is engaged by a worm 101 carried by one end of a horizontal rotative shaft which is mounted' in suitable bearings on the frame and is provided at its other end with a beveled gear wheel 103 which meshes with a pinion 104: that is fixed to the rear end of a telescopic, flexible operating shaft 105 lwhich extends forwardly to the engine 10,7. The said telescopic shaft is providednear its rear and its front ends with universal or gimbal joints-109, 110, respectively, and the vforwardmost section 111 of the shaft is mounted in a bearing carried by the upper end of a standard 112 mounted on the rear platform 113 of the'engine. The said shaft sec-A tion 111 is provided with a hand crank 114 by'which the shaft may be turned. Rotation of the shaft acts through the lworfl ear and rack and pinion mechanism describedA to reciprocate the disk actuating shaft in one direction or the other at will, thus avoiding the necessity of hand actuated levers onthe plow frame or other complicated mechanism for o erating the disk raising and lowering meclianism. The flexible construction of the operating shaft 105, and vits telescopic arrangement permits the angle of the engine and motor to be changed relatively to the plow frame without imposing side stress on the bearings of the operating shaft.

' a brace chain 118, the chain being trained .over a sheave 119 near the front end ofthe link 116 and being attached to the opposite ends ofthe equalizing bar in any suitable manner. The chain 118 is normally locked to the bar by the pin 118 adapted. -to be dropped through the bar 116 and through one of the chain links. This pin may be 'removed to permit the bar 116 to be swung sidewise relatively to the chain when cou-- -pling the engine to the plow, Mounted on said equalizing bar and attached thereto by the clevises 120, 120 are a. plurality of sheaves 121, there being onelocated at each end of the bar and a pair located near the center of the bar. Trained through s'aid sheaves 121 is adraft chain or cable, one

end 122 of which is attached to a bar 123 which is pivotally connected to Ya draft plate medias 121i attached in any suitable manner to the fra-me in rear of 'l its longitudinal center;.

the other end 126 of said chain or cable being attached to a. similar bar 1227 pivoted'...

to a like draft plate 128 attached to the frame near the front end thereof. rlhe endsY 'I 122 and 126 of the chain or cable are trained over the end sheaves 121 and the central looped portion 130 thereof is trained about the central pairs of sheaves 121 of the equaliz'ing bar with the bight of said looped por-` tion of the chain or cable trained about a sheave 137 that is mounted on tne forward end of a third draw bar 132 which is pivotally connected to a draft plate 133 that is attached to the frameA between the ldraft plates 124 and 128. The plow is drawn for Wardly askew, or with thelongitudinal'axis of the frame oblique to'the line of draft, so that the succeeding rear plows will fol low each other parallel to theline of draft slightly at one side of the plow infront thereof. ln case the engine should turn slightly from a. direct line of travel, as indicated by the dotted lines in Fig. 9, the equalizing bar will be swung obli( uely to the line of draft, but the draft c ainor cable will shift endwise in the guide sheaves, the longer end 122 paying out to `increase its length while the shorter end is taken up or shortened, as indicated in dotted lines in said Fig.A 9. There is no tendency therefore upon slight swerving of the engine for the rear end of the plow to' be swung out of the line of draft in a manner to increase the angle of the plow frame to the normal line of draft and thereby imperfectly plow the ground, such as would occur if the draft connections were nonequalizing. This feature of lthe invent-ion may be' applied to gang plows of different constructions where there is a tendency upon slightY turning ofthe engine to swing Y the plow out of the line'of draft.

When the plow is to be moved from place to place over a roadway the operating rod 105 will be disconnected from the engine and may be swung downwardly over the plow frame, and the draft link 116 is disconnected from #the draw bar of the enginer and the draft connections thrown backwardly over the gplow. The enginewill then be hitched direeltly tothe end of the 'plow frame, as to th`e forwardmost draft bar 127,

so as to. draw the frame forwardly in the line of its 4longitudinal airis.l It willfhof course be understood that preparatory 'to moving the plow from place to place the frame and plowscarried thereby will be,

raised by the raisirgand lowering screws 43.

and 55 before described.

Inox-der that the supporting wheels and rollers may trail and be held in paths parallel to the line of travel of the plowswhen' on the road, and may trail and be held in paths parallel to the line of draft when the plow is in operation, I have connected the several rolling supporting elements in a manner which will now be described.

TheA axles for the forward'furrow and land wheels 24 and 31 are connected by the link 135 which is pivotally connected with fixed arms on the swinging stub axles for said wheels. The swinging axles of the land wheels 29 and 30 are connected through links 136 and the draw bars 123, 132 to the adjacent supporting and draftregulating rollers 34 and 33, respectively, the end sections of the links being pivotcd to arms rigid with said rollers and swinging axles. rlhe roller 34 is connected by a link 137 to the axle of the rearmost roller 35, which roller is in turn Aconnected by a link 138 to the swinging axle of the rear furrow wheel 25. The connecting links 135, 136, 136 extend transversely to the draft bars 127,132 and 123,'respectively, and suitable interlocking connections are arranged between the frame and draft; bars so as to positively throw the axles of the wheels and rollers at right angles to the line of draft when the engine is hitched to the plow for work in the field.

The connection between the forwardmost draft bar 127 and the link 135 consists of a pin 139 that is dropped through openings in said bar and link, as shown in Fig. 1. The links 136, 136 may be made of inner and outer sections, as shown in Fig. 1, with the outer ends of the inner sections loosely connected to lugs 140, 140 on thedraft bars 132 and 123 and the inner ends of the outer sections connected by the pinsl 111, 141 to said latter draft bars. When the plow is to be adjusted for traveling on the road the pin 139 is removed from the draft bar 127 and link 135 and the draft bar is permitted to swing freely. The other draft bars 132 and 123 are swung over brackets 144 fixed to the frame so as to be parallel with the longitudinal axis of the frame and said bars and brackets are apertured as shown in Fig. 1 to receive pins by which the parts are locked together. When said bars are thus swung to the center of the plow frame'all the rollers 33, 34 and 35, and the wheels 30, 29 and 25.are swung into positions parallel with the ,longitudinal axis of the plow frame. When the engine is hitched to the forwardmost draft bar 127 said bar is swung into line 'with the plow frame and said bar and the forward wheels 24 and 31 automatically fnd their positions in line with the longitudinal axis of the plow frame.

The equalizing draft connection above described is not herein claimed but is made the subject of an application for U. S. Letters Patent, filed on the 19th day of May, 1911,

Serial No. 628,336, which is a division of this application.

It will be observed that the spaced disk edges 36 of the rollers 33, 34 and 35 are beveled on one side and are straight on the other side. The beveled sides of said disk edges are on that side of the disk which face the plow disks, or on the side thereof opposite that toward which the plow tends to be shifted by the lateral thrust of the disks. This arrangement insures that the disk edges will be forced into theground in reliable holding engagement therewith. The roller described may be used with other forms of gang plows when necessary to guide the plow and hold it in its line of draft.

It will be obvious that the constructions described are capable of considerable variation within the spirit and scope oflmy invention and that certain of the features of construction herein claimed are capable of associated or independent use with respect to the particular form of plow frame shpwn.

I do not wish to be limited to the specific details of construction and combinat1on of the elements illustrated except as hereinafter made the subject of specific claims.

I claim as my invention:-

1. A wheeled gang plow comprising an` elongated, continuous, unitary frame arranged to be drawn forward at an oblique angle to the line of draft, asingle row of plows pivotally mounted on said frame and arranged to be raised out of and lowered into the ground, said frame being provided with spaced joints or hinges to permit vertical [lexure of the plow to adapt itself-"to uneven ground, and raising and lowering means for the plows embracing a reciprocating member consisting of hinged sections, guiding means on the frame for guiding the member in reciprocating .movement, and means for reciprocating said member.

2. A wheeled gang plow comprising an elongated, continuous frame consisting of side and end members arran ed as a parallelogram, tbe side members Ieing provided with joints or hinges with the hinges of one member arranged diagonally opposite to those of the other member', a single row of plows pivot-ally connected with one member of the frame by means permitting the plows to be raised from and lowered into the ground, a reciprocable bar mounted in the frame and connected with said plows and provided opposite to the joints or hinges'of one of the frame members with hinges to permit the bar to flex with said frame members, and means for reciprocating said bar.

3. A, wheeled gang plow comprising a frame consisting -of side and end members arranged as a parallelogram, the side members being rovided with joints or hinges with the hinges of one member arranged diagonally opposite to the hinges of the other member, thereby dividing the frame into a plurality of flexible sections, land and furrow supporting wheels, and sup porting and draftregulating rollers for r .said frame and a single row or serles of plows supported by one of said frame members.

draft regulatingrollers for said frame and a single row orseries of' plows supportedby one of said frame members, said rollers being formed with spaced edged disk members arranged to cut -into the unplo'wed ground.

5. A wheeled gang plow comprising a` frame consisting of side and end members arranged as a parallelogram, the side mem.-

bers being .provided with joints or hinges with the hinges of one member arranged diagonally opposite to the hinges of the other member, thereby dividing the frame into a plurality of flexible sections, land and fur-v .row supporting wheels and supporting and draft regulating rollers for said frame and a single row or series of plows supported by one of said frame members, said rollers. 'being formed withspaccd edged disk mem- 'bers arranged to cut into the unplowed ground, Athe edged disk members being bev eled on the sides thereof adjacent to the rows of the plows, and, being straight on their other sides.

6. A wheeled gang plow comprising a frame consisting of side and end members arranged as a pa-rallelogram, the side members being provided with joints or hinges with the. hinges of'one member arranged diagonally opposite to the hinges of the other member, thereby dividing the frame into a plurality of ieXible sections, land and lfurrow supporting wheels, and supporting and draft regulating rollers for said frame and a singlerow or series of plows supported by one of said 'frame members', said rollers embracing spaced edged disk membersarranged to cut Ain the unplowed ground, and wide tread supporting wheels arranged ad' jacent to the plow side of the frame.

7. A wheeled gang plow comprising an elongated, continuous frame consisting of side and end members arranged as a parallelogram, with supporting wheels and supporting and draft` regulating rollers, the yside members being provided with joints or hinges with the hinges of one member arranged diagonally opposite to those of the other member, a single row of plows pivotally connected with Yone member of the'frame by means permitting the plows to be raised 4. A wheeled gangplow-comprising a- Ibrackets, means actin from and lowered into the ground, a reciproeable-bar mounted in the frame and connected with said plows and provided opposit'e to the j oints o r hinges of one of the frame members with hinges to permit the bar to flex with said frame members, means fo-r reciprocating said bar, and screwthreaded means associated with said supporting wheels and supporting and draft regulating rollers for raising the frame and plows relatively tothe wheels and rollers.

8. A wheeled gang plow comprising a frame, plows carried thereby, land furrow' wheels for'supporting the plow and a supporting and draft regulatinguroller arranged totravel on the unplowed ground and provided with a series of spaced circumferential edges:

9. In a wheeled gang plow, a supporting' and draft regulating roller enitending transversely of the plow frame and comprising a plurality of longitudinally spaced, edged disk members, an upright bearing member connected with theroller and having rotative ,bearingin the frame permitting the angle of thev roller to the frame to be varied, and means for lockinglsaid roller in fixed relation to the frame. l

l0. In' a wheeled gang plow, a support j i ing and. draft regulating roller extending transversely of the piow frame and' com# prising a plurality of longitudinally spaced,

.edged cutting members and means for connecting the roller tothe plow frame, said cutting edges being all beveled on one'side and straight on the other side, for the purpose set orth. i

1l. In a wheeled gang plow, a supporting and draft regulating roller extending trans# versely of the plow frame and comprising a plurality of longitudinallyspaced, edged disk .members meansy for connecting the Iro'ller to the plow frame, said roller being provided with an upright bearing stem, a bearing sleeve in the frame in which said stem has rotative bearing, and a screwthreaded adjusting sleeve vhaving screwthreaded engagement with a part connected with the' plow frame and bearing-on said stem for the purpose of raising and lowering theframe relatively to the said roller."

12. In a wheeled gang plow, 'a frame, a

-plurality of plow supportmg brackets pivoted to said frame, plows mounted on said on said brackets for simultaneously swinglng all of said Aplows away from or .toward the ground compris-` 'ing a reciprocating bar mounted on the frame, and connections between the plow brackets and reciprocating bar comprising links pivotally connected to the plow lorack-` ets and having sliding and pivotal connection with the reciprocating bar, and springs associated with said bars and act-ing on sald brackets to normally hold the plows in the ing a reciprocating bar mounted on the frame, and connections between the plow brackets'and the reciprocating bar 'comprising slotted links pivoted to the plow brackets, brackets connected with the reciprocating bar and extending into the slots of the link,r0ds pivoted to said plow brackets and having sliding engagement with the first named brackets and springs interposed between said first named brackets and shoulders on said rods.

14. In a gang plow, the combinationA with a frame, a bracket pivoted thereto and a plow mounted on said b wicket, of means for swinging the bracket on its pivot to raise and lower the plow, embracing a link pivotally connected with the bracket, an operat ing device therefor, said link having slid- `ing and' pivotal connection with the operating device and a spring interposed be tween the latter pivotal connection and said bracket for holding the plow in the ground and arranged to yield to permit the plow to swing out of the ground.

15. The combination with a rane )low frame having a plu `ality of gang plows and an engine for pulling the plow, of means for raising and lowering the plows from the ground, embracing a reciprocating bar on the plow frame operativclyconnected to the plows, a pinion meshing with the bar, a worm gear mechanism for rotating the pinion, an operating shaft geared to said worm gear mechanism and extending forwardly to the engine, a bearing for the operating shaft on the engine and a crank device connected with said shaft at the engine.

1G. The combination with 'a gang plow frame having a plurality of gang plows and an engine for pulling the plow, of means for raising and lowering the plows from the ground, embracing a reciprocating bar on the plow frame operatively connected to the plows, a pinion meshing with the bar, a worm gear mechanism for rotating the pinion, a flexible and telescopic operating shaft geared to the worm gear mechanism and eX- tending forwardly to the engine, a bearing on the engine in which vthe forward end of the shaft is rotatively mounted and a crank 

